BDD: Feature/connection

@suneet.aw requesting you to merge feature/connection into main.

features/connection/PCMConnection.feature

+ As a PCM user, 
+    I want to register with an organization
+    So that I can leverage GAIA-X ecosystem
+
+    Scenario: I want to become a member of an organization (a GAIA-X Participant)
+        Given PCM Application should be configureameter alias set to 'member') and sends to PCM register email address.  
+        When  PCM Application scans the provided d on the user device.
+        # src/connections/controller/controller.ts-> Rest API POST METHOD -> NAME 'invitation-url' 
+        And OCM admin generates QR code ( with parQR code.
+        Then Pairwise DID and ver key is exchanged between the agents. 
+        And the Connection is established between the PCM aries agent and organization aries agent.
+        # Webhook call on topic 'CONNECTION_MANAGER_SERVICE/ConnectionStateChanged'
+        And connection state moves to complete state.
+        # Nats call on topic 'PRINCIPAL_MANAGER_SERVICE/connectionCompleteStatus'
+        And Principal membership credentials are issued.
+
+    Scenario: I want to subscribe to a service of an organization (a GAIA-X Participant) 
+        Given PCM User should be member of an organization.
+        And OCM admin/portal generates QR code ( with parameter alias set to 'subscriber') and email/display on portal.
+        # src/connections/controller/controller.ts-> Rest API POST METHOD -> NAME 'invitation-url'
+        When  PCM Application scans the provided QR code.
+        Then Pairwise DID and ver key is exchanged between the agents. 
+        And the Connection is established between PCM aries agent and organization aries agent.
+        # Webhook call on topic 'CONNECTION_MANAGER_SERVICE/ConnectionStateChanged'
+        And connection state moves to complete state.
+        # Nats call on topic 'PROOF_MANAGER_SERVICE/sendMembershipProofRequest'
+        And Principal membership verification to make connection trusted. 
+        And OCM admin issues the verifiable credential over a trusted connection.
+